136 
OHIO BIOLOGICAL SURVEY 
EXPLANATION OF PLATE XV. 
Note: Where no magnifications are given an enlargement of 79 diameters for perithecia, and 450 diame¬ 
ters for hairs, paraphyses, asci, and spores is to be understood. The illustrations were drawn from a 
magnification double that given here and reduced one-half in the process of reproduction. 
1-7. Delitschia leporina. 1. Perithecium. 2. Paraphyses, branched and 
unbranched forms. 3. Ascus. 4. Spore within ascus wall. 5. Mature 
spore. 6. Immature spore showing hyaline envelope and thick wall. 7. 
Irregular spore forms in outline. 
8-14. Delitschia vulgaris. 8. Perithecium crushed. 9. Hair of beak. 10, 11. 
Ruptured asci. 12. Mature spore. 13. Same seen endwise. 14. Old spore 
showing germ-pores. 
I 
